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Finding the Fourth Proportional to 139,190.82, 208,600.11 and 72,490.92

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Solution

The fourth proportional to 139,190.82, 208,600.11 and 72,490.92 is: 108,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,190.82 : 208,600.11 = 72,490.92 : x
  2. Step 2: Convert to fraction form
    139,190.82/208,600.11 = 72,490.92/x
  3. Step 3: Cross multiply
    139,190.82x = 208,600.11 × 72,490.92
  4. Step 4: Simplify right side
    139,190.82x = 15,121,613,886.00
  5. Step 5: Solve for x
    x = 15,121,613,886.00/139,190.82
  6. Step 6: Final answer
    x = 108,639.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.